2011 Field excursion to historically active Chilean volcanoes

Du 29 janvier au 9 février 2011

This excursion will focus on both volcanological and petrological aspects of three Holocene volcanoes of the Andean Southern Volcanic Zone, all of which have been active in historic times. These are Antuco (37.2S), Lonquimay (38.4S) and Llaima (38.7). Llaima, which will be visited for 4.5 days, is in a period of prolonged but sporadic activity that began in May, 2007 and which has included paroxysmal eruptions in January, 2008 and April, 2009. These are dominantly mafic centers, but there are silicic pyroclastic flow and fall deposits in addition to mafic tephra and lavas, lahar deposits, and a sector-collapse debris avalanche at Antuco. We have been studying Llaima since February, 2007 from the standpoint of integrating eruptive dynamics with petrology-geochemistry, and we have amassed a substantial amount of information that will be presented during the excursion.

Chile

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January 29: Depart Switzerland for Santiago de Chile (LAN Chile or Iberia, from Madrid)

January 30: Arrive by air in Los Angeles, Chile from Santiago

January 31-February 1: Antuco (departing for Lonquimay afternoon 1st Feb).

February 1-2: Lonquimay February 3: Lonquimay to Llaima

February 4-7: Llaima

February 8: Depart Temuco, Chile for Santiago and Switzerland

February 9: Arrive in Switzerland

We anticipate a subsidy from the DPMS of at least 2500 CHF per person, which will necessitate individual contributions of several hundred francs (more details later)

Registration deadline : 31rst October 2010

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